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Small business government contractors

Profiles of small businesses registered on SAM.gov to win federal contracts: CAGE code, UEI, registration status, SBA certifications and federal contract history. 34,768 of them have won federal contracts or SBIR/STTR awards in the last few years.

Or list small businesses by state, NAICS code or certification

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Small businesses in Illinois, with primary NAICS code 541330 (Engineering Services), by federal contract dollars

Ranked by federal prime contract dollars as a small business since FY2024 (USAspending.gov, as of Nov 5, 2026).

How these are ranked

Prime contract dollars since fiscal year 2024 on contracts where USAspending.gov counts the firm as a small business. “Small” is set per NAICS code: these firms are registered small under their primary code (or SBA-certified). Firms that hold small business subcontracting plans, which only businesses that aren't small file, or have $1 billion or more in these contracts are left out. A profile's yearly totals count all of its prime contracts, so they can be higher.

  1. WBK Engineering LLCSaint Charles, IL · $12.7 million8(a)
  2. Prairie Engineers, P.C.Columbia, IL · $6.8 millionWOSB
  3. Cotter Consulting LLCBurr Ridge, IL · $6.8 millionWOSB
  4. Virtual Energy Solutions IncWestern Springs, IL · $1.8 millionSDVOSB
  5. Creative Thermal Solutions, Inc.Urbana, IL · $1.2 million
  6. Hurst-Rosche, Inc.Hillsboro, IL · $930,563HUBZone
  7. Hurst-Rosche, IncEast Saint Louis, IL · $598,471HUBZone
  8. Roberson & Associates LLCSchaumburg, IL · $497,535
  9. Kaskaskia Engineering Group LLCBelleville, IL · $389,413WOSB
  10. Alpha 7 Technologies IncChicago, IL · $363,117SDVOSB
  11. All About Pavements IncChatham, IL · $239,709
  12. Shearwater Technology IncWashington, IL · $166,636
  13. Applied Materials Technologies Inc.Naperville, IL · $69,068
  14. Servotech IncChicago, IL · $29,250
  15. Smith Lasalle IncWestern Springs, IL · $20,480
  16. JBZIM Properties LLCFrankfort, IL · $500
Top firms by certification in Illinois, with primary NAICS code 541330 (Engineering Services) (8(a), HUBZone, WOSB and SDVOSB)

Top 8(a) firms in Illinois, with primary NAICS code 541330 (Engineering Services)

  1. WBK Engineering LLCSaint Charles, IL · $12.7 million

Top HUBZone firms in Illinois, with primary NAICS code 541330 (Engineering Services)

  1. Hurst-Rosche, Inc.Hillsboro, IL · $930,563
  2. Hurst-Rosche, IncEast Saint Louis, IL · $598,471

Top Women-owned small businesses in Illinois, with primary NAICS code 541330 (Engineering Services)

  1. Prairie Engineers, P.C.Columbia, IL · $6.8 million
  2. Cotter Consulting LLCBurr Ridge, IL · $6.8 million
  3. Kaskaskia Engineering Group LLCBelleville, IL · $389,413

Top Service-disabled veteran-owned in Illinois, with primary NAICS code 541330 (Engineering Services)

  1. Virtual Energy Solutions IncWestern Springs, IL · $1.8 million
  2. Alpha 7 Technologies IncChicago, IL · $363,117

Hiring small subcontractors?

If you're a prime looking for small businesses to team with, use the filters above to list small firms by state, NAICS code and certification, then open a profile for its SAM.gov registration, the codes it is small under and its contract history. Check any firm by name, UEI or CAGE code with the CAGE code and UEI lookup.

About these profiles

Every business registered on SAM.gov as small under at least one NAICS code, and every SBA-certified firm, has a profile; each profile says which codes it is small under. Registration details come from SAM.gov's public entity extract and contract figures from USAspending.gov. Contact names and street addresses are left out. Looking for partners to team with? See how to become a government subcontractor.

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